Woodlands.co.uk

Blog - January 2024

sun in woodland

Wonderful solitude

by Shaun, 26 January, 2024, 0 comments

The end of lockdown, and the peace that came with it, was what made me want some natural solitude as the world got busy again. Having a share of a near 100-acre ancient wood should provide that given there are no public footpaths through it, a locked gate and farm land all around. It was late summer when I ‘got the keys’ and I was recovering from major surgery, so over the autumn into winter I’ve pottered and observed.  Each visit the place looks different as the leaves fall, different fungi come and go, and the wood is deluged by each storm. Storm Babet blew down the largest silver birch tree. The kids discovered it – wading through the thick brown bracken in a clearing I’d yet to explore. They had fun running along it. So far, no more have come down, and I’m glad I bought the Beech Tree wood owners insurance before the first storms hit. There is about one acre of older pine that stand majestic, almost as a guard for the younger trees beyond. We’ve re-planted our Christmas tree here. I hope it takes! Then it’s a grassy break, that allows machinery to manage a drainage dyke, across a wooden bridge and into the 4 acres of dense young birch coppice. This needs a lot of thinning out, if owt else is to grow there. The west boundary is a huge sheep field and the sun pours in. It wasn’t until my fifth visit that I managed to get through to a far corner of the plot and find another small clearing, where clearly deer had been laying on the dead bracken. I hesitate to say basking in the winter sun ….....  in Yorkshire! There’s evidence of badger setts too but none seem active. Woodcock abound and I will have to control the dog in spring. It isn’t silent but I’m surprised there isn’t a greater dawn chorus when I visit. Perhaps the buzzards and red kites are scaring smaller birds off.   I certainly hear those birds of prey about. Is this a sign of climate change or a lack of tree diversity? To help the both I’ve planted some cuttings of hazel and walnut, and a variety of seeds – conkers, acorns, sloes, sweet chestnuts, sycamore and walnut, but goodness knows if anything will germinate, or whether the squirrels have had a feast!  It was a rushed affair as I wasn’t completely recovered from surgery when I did it. There are lots of plots within the greater wood and I’ve met many of my neighbours, who are all very friendly. At least one is an outstanding wildlife expert and I’m sure there’s lots to learn from them.  I don’t have great plans as yet other than increasing the diversity of trees. A fig tree at home next to a west facing wall does really well.   Will the west facing aspect enable similar here?  There seems to be some quite large structures within the wider wood. On my plot, there’s a small hut and I don’t have plans for anything more. I just want to observe for a year, open up a couple of paths through the jungle and create somewhere flat to camp. There is wonderful solitude and the dog loves it – even though she has come back with ticks. Neighbours have told me their 'tick stories' and I’ve noted that they wear thick overalls and boots.   Probably best  if I string up a hammock to watch the sunsets!  
Wildlife in Scotland

Wildlife in Scotland

by The blog at woodlands.co.uk, 18 January, 2024, 0 comments

NaturScot is Scotland’s nature agency.  It monitors and reports on all aspects of the natural environment.  It has published a report on its terrestrial bird breeding species and it is a somewhat mixed report. Some of the most ‘famous’ species associated with Scotland, such as the black grouse have declined significantly during the period of study (1994 - 2019).  The grouse population has halved, and the kestrel, greenfinch and lapwing populations are also in decline.  Woodland populations of Capercaillie have also fallen.  The largest grouse in the world, the capercaillie was once widespread but suffered local extinction in the eighteenth century and was reintroduced in the C19th. It is now only found in old pine forests and mainly in the Cairngorms National Park. The Capercaillie are now red-listed and protected in the UK. [The Pine Marten which feeds in part on the eggs of game birds was almost lost in the nineteenth century, due to farmers and gamekeepers trapping them.] The fall in bird numbers has been associated with changes in climate, notably warmer and wetter weather coupled with extreme events (such as flooding and heat waves).  Whilst some species have suffered as a result of the changing weather, others seem to have prospered, including some that do not ‘traditonally’ make their way to Scotland.  The great spotted woodpecker is one such species, its numbers have increase by 500%, bullfinch and red numbers have also increased.  Gold finches and magpies are now more common on farmlands in Scotland. various measures could help offset some of these declines,.such as  the diversification of woodland (more tree species) restoration of peatlands Creation of habitats on farmland legal predator control deer exclusion to allow regeneration removal of deer fencing, (where feasible) as capercaillie and black grouse are known to fly into this and injured as a result. One example of the benefits of deer fencing is to be seen in the Glen Lyone woodlands.  Historically, this area was part of the royal hunting grounds of Cluanie and was home to capercaillies, wildcats and lynx.    Nineteenth century maps show a significant area of woodland, but by the 1990’s less than a hundred of the ancient pines were left.  The oldest pine in the area dates back to the C14th century, and many others are several centuries old.  However, the area was heavily grazed by deer, which reduces regeneration as young seedlings / saplings get eaten.  Now “Trees for Life” have erected new deer fencing, which hopefully will allow natural regeneration of pine forest in the area.  Calendonian Forest once covered much of the Highlands but now less than 2% of it survives.  Full details of this project (and a video) may be found here ; https://treesforlife.org.uk/scotlands-oldest-wild-pine-saved/
Seed dispersers.

Seed dispersers.

by The blog at woodlands.co.uk, 10 January, 2024, 0 comments

Many organisms help to disperse seeds in woodlands or forests, from squirrels, birds, bears, foxes, rabbits.  The fruits / seeds may be eaten and pass through the gut of the animal or may be caught in their fur, or stuck to them (like the seeds of mistletoe or cleavers).  However, there is another 'army of helpers'  - ANTS.  Ants may disperse seeds in two distinct ways.  The first way is  through the activity of harvester ants.  Like squirrels and other ‘gatherers’, harvester ants move through the wood or forest gathering seeds and transporting them back to their colonies.  As they transport the seeds, some get dropped or lost on the way.  Others may be ‘cached’ / stored,  in or near the colony for later consumption, but then are ‘forgotten’.  Such seeds may later germinate and establish themselves somewhere away from the parent plant.  This accidental dispersal is sometimes referred to  as  ‘seed predation’. a second method of seed dispersal by ants involves a more intimate association between particular plants and specific ant species.Some plants, when they form the seed, produce an 'extra structure', attached to the seed; an ELAIOSOME or fat / oil body.  This elaiosome lures or attracts ants to the seed.  Wood anemone and cow-wheat (Melampyrum pratense) seeds have an elaiosome. [caption id="" align="aligncenter" width="512"] cow wheat ; thanks to Kristian Peters -- Fabelfroh 09:39, 3 October 2006 (UTC), CC BY-SA 3.0, via Wikimedia Commons[/caption] Ants need some fat, and fat-rich food is hard to come by in the woodland setting.  The ant carries off the seed to the colony, where the fat body is eaten (often by the ant larvae).   The seed is then left and can later germinate. This interaction between plant and ant is termed  MYRMECOCHORY. It is a form of mutualism, as there are benefits to this arrangement for both ‘partners’. The seeds of the plant are ‘protected’ from seed predation by birds and rodents.   The seed is dispersed from the parent plant, ants bearing a seed for some 70 metres have been recorded.  The seed is then (often) deposited in a nutrient rich microhabitat. The ant gains a ‘tailor made’ food material rich in fat, an energy rich material.  In some areas, such as Australia, the seed may be protected from fire as it is buried at some depth. Myrmecochory is seen in many species in north eastern America, but also Europe, Australia and Africa. wood ants https://www.youtube.com/watch?v=ZVGcl4Om-C8&t=40s    
Woodlands Web Notes : 30

Woodlands Web Notes : 30

by The blog at woodlands.co.uk, 1 January, 2024, 0 comments

Willow bark and the covid virus. The Covid pandemic created great strains on health and business services, and the virus continues to impact society in many ways.  It is not surprising that there is an ongoing search for anti-viral agents. Finnish scientists have found that willow bark may have a role to play. Willow bark has been used as a natural medicinal product over the centuries as an effective agent to treat pain and inflammation.  The anti-inflammatory properties of the bark are generally ascribed to salicin, which was to lead to the development of acetylsalicylic acid, that is aspirin.  The Finnish scientists ground up the willow bark in hot water and then sieved it to create an ‘extract’.   This solution was then added to a number of cell cultures that were exposed to different viruses (enteroviruses, a seasonal coronavirus and SARS CoV2).  They then monitored the viral activity, cell infection and viral replication  The extract had an effect on all of the viruses.  In some cases, the extract affected the envelope of the virus (a structure surrounding the viral genetic material) so the viruses essentially broke down, whereas others were prevented from releasing their genetic material and reproducing.  Specifically, though the Covid-19 virus could enter cells when treated with the extract, it could not reproduce once inside. The research team analysed the extract’s chemical composition and tested some known constituents of bark but concluded the success of the extract probably resulted from the interactions of different biologically active compounds.  Compounds in the extract included many complex chemicals (for example, hydroxycinnamic acids, salicylates, flavonoids, flavan-3-ols, and proanthocyanidins (polyphenols).  Further work will focus on the role / interactions of these various compounds. The Hazel Dormouse in peril. The numbers of the hazel dormouse have fallen dramatically since the turn of the century.  The dormouse has disappeared from Staffordshire, Northumberland and Herefordshire in the last few years.  This loss is attributed to The destruction / fragmentation of their habitats Poor management of woodlands and hedgerows, leading to a loss of diversity / niches Rising deer numbers, feeding on saplings and shrubs Extreme weather patterns may also play a part Captive-bred dormice have been re-introduced to some 25 sites in 13 counties across the country, sadly nine of these reintroductions were not successful.  Dormouse bridges have been created to enable the animals to move between areas dissected by major roads (such as the M1), others are planned.   The dormouse (Muscardinus avellanarius) is a nocturnal animal and lives mainly in deciduous woodland,  it feeds among the branches of trees and shrubs. the dormouse rarely descends to the ground.  It feeds on a wide variety of 'foods' ;  flowers (nectar and pollen), fruits (berries and nuts), certain buds and leaves and some insects, such as aphids and caterpillars. The hazel dormouse is regarded as a ‘flagship species’, that is to say, if the dormice are thriving then it is likely that other species are too from butterflies to birds such as the nightingale.  Dormice are currently assessed as ‘Vulnerable’ to extinction in Britain under IUCN Red List criteria, but recent studies suggest a classification of ‘Endangered’ might be more appropriate.  Certainly, their future is uncertain. Detailed information on the hazel dormouse is available at PTES (note this link opens a PDF).  Their report details the state of hazel dormice in 2023. zsaqwa https://youtu.be/4u-yMkXOuTY Changes in the Boreal Forests. Boreal forests encircle the northern reaches of the Earth, lying just below the treeless under of the Arctic.  These forest cover large areas of Alaska, Canada, Scandinavia and Siberia.  These forests contain billions of trees, most are conifers but birch, poplar and aspen may also be found.  The trees (and soils) contribute significantly to the cycling of carbon in nature, absorbing carbon dioxide in photosynthesis. They are also home to many species of migratory birds, plus predator species such as lynx and brown bears, and wandering herds of moose. Due to the remoteness of these forests, they have remained (until relatively recently) unaffected by human impact.  Now these forests are warming at a rate above the global average.  This has a number of effects:  In the southern parts of the boreal forest. Conditions are becoming too warm for cold adapted trees; their growth is slowed and they may die. With the warming comes increased dryness, which leads to water stress and increased risk of insect attack /  infestation. The dryness also means that forest fires are more likely and occur with increased ferocity.  This year, the fires in Canada have been particularly extensive and damaging.  Some 18.5M hectares went up in flames.   The plumes of smoke spread far and wide. [caption id="attachment_40597" align="aligncenter" width="675"] Canadian forest fire[/caption] Scientists are now using satellites to track changes in the extent of the boreal forests.  If trees are being lost on the southern edge of these forest, then it might be expected that the northern limit for tree growth might change.  Indeed, there is some evidence for this in Alaska where young Spruce are now growing some 25 miles beyond the previous tree line, moving into the ‘treeless tundra’.  It may be the loss on the southern edge is compensated by extension of the most northern parts of the boreal forest, but it is not clear whether tree can ‘move’ at the rate of climate change.